Anthropic outage — August 18, 2026
Degraded performance for multiple models
Anthropic’s Claude.ai was disrupted for 3h 01m on August 18, 2026.
Key facts
| Detected | August 18, 2026 · 16:23 UTC |
| Confirmed | 16:23 UTC |
| Resolved | 19:24 UTC |
| Duration | 3h 01m |
| Service | Claude.ai |
Timeline
- 16:23Z
Detected · Official
Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal. - 19:24Z
Resolved
Signal volume fell back below the threshold; the event was closed.
How this was detected
1 independent evidence class for claude-ai on ANTHROPIC. 2 crowd reports across bluesky (single platform — not corroborating), z=+0.1σ vs the cell baseline. Official notice confirms it.